Blizzcon is just starting and already we are seeing much more information on the Terran and Protoss. Zerg seem to still be in the concept stage. Both the Terrans and Protoss are playable at Blizzcon as well. The current tech-trees for the two races have been revealed as well.

More changing to the units has been done as well, for instance the Tempest has been replaced by the more popular Carrier from the original starcraft. The Twilight Archon has changed it's appearance and now sports the Dark Archon's feedback ability. The Star Relic has been changed to the Stasis Orb, a secondary support unit caster.

The Terrans remain pretty close to what we know so far, however the Missile Turret has lost it's detection ability, and we know the Thor cannot be transported by Dropships.

As for the storyline, Valerian Mengsk (Arcturus' son who was introduced in Firstborn) has been confirmed to be in the game.

Lavarinth wrote:They confirmed all previous units from StarCraft will be included in the StarCraft II Editor.

Yeah, but how about axed units?

They have said all of the beta/alpha stuff they aren't using will be included, such as the Soul Hunter and the Tempest. Apparently they are also leaving the wc3 hero system available in the editor, as well.